Getting a class with Class.forName

Question

Take a look at this line below:

targetClass = Class.forName(className).newInstance().getClass(); 

My question here is why it calls newInstance (). getClass ();

Is it enough to write

 targetClass = Class.forName(className); 

?

Answer 1

It makes no sense to call newInstance().getClass() , because it will give the same Class instance where it was created from.

Rather, it creates an additional instance that will be immediately deleted. Even this will not work if the class does not have a default constructor.

In addition, the cost of creating, initializing, etc. may be wonderful.

Answer 2

Yes.

 Class<T> targetClass = Class<T>.forName(className); 

And in creating objects it is better to use getConstructor.

 T obj = targetClass.getConstructor().newInstance(); 

A call to Class.newInstance shows the problem identified in javadoc.